Smoothing and truing ring for stuffing-boxes.



A. H. FRANKE.

SMOOTHING AND TRUING RING FOR STUPFING BOXES.- APPLIGATIONHLBD 00T.30,190s.

Patented June 15,1909...

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AUGUST H. FRANKE, OF ST. LOUIS, MISSOURI.

SMOOTHING AND TRUING RING FOR STUFFING-BOXES.

Specification of Letters Patent.

Patented June 15, 1909.

.Application led October 30, 1998. Serial No. 460,247.

\ metal rings to be used in connection with flexible packing rings in astuffing box er the like, which metal rings serve to smooth and true upthe surface of the piston rod or reciprocating shaft operating throughthe stuffing box, and which metal rings co-act with the flexible packingrings to forni a perfect pacling in the stufling box, and therebyprevent the escape of fiuid pressure through said stuffing box.

To the above purposes my invention consists of certain novel features ofconstruction and arrangement of parts which will be hereinafter setforth, pointed out in the claims, and illustrated in the accompanyingdrawings, in which- Figure 1 is a vertical section taken through thecenter of stu'fl'ing box and showing my improved truing and smoothingrings ai'- ranged therein; Fig. 2 is a detail section illustrating amodified form of one of the truing and smoothing rings; Fig. 3 is aneleva tion partly in section of one of the truing and smoothing rings;Fig. l is an edge view of one of the rings; Fig. 5 is a detail viewlooking against the inner surface of one of the sections of a ringconstructed in accordance with my invention.

.Referring by numerals to the accompanying drawings: 1 designates apiston rod or reciprocating shaft which is arranged to operate through astuffing box 2, which latter is provided with the usual gland 3.

The smoothing and truing rings as contemplated by my invention and whichoccupy the annular chamber formed in the stuffing box 2, are formed ofbrass or analogous material, and each comprises a series of Asegmentalsections 4 which, when properly united, form a complete ring, and eachsection being provided with a wide inner face or periphery 5, a narrowouter face or periphery 6, and with the inclined or beveled side faces7. The inner faces or peripheries 5 of the ring sections 4 are providedwith continuous grooves 8, or in some instances with the diagonallydisposed cross grooves 9, and the sharp edges formed between the sidesof these grooves and the inner faces of the ring sections, form cuttingedges which engage the surface of the rod or shaft 1, to smooth and truethe same as said rod or shaft reciprocates through the stufling box.These grooves also serve the purpose of lubricant reservoirs, inasmuchas they receive and retain 'the lubricating oil applied to the surfaceof the piston rod or recipro cating shaft 1.

The adjacent ends of the ring sections are beveled as designated by 10,and formed in the outer faces 6 of the ring sections are deep grooves 11which, when the ring sections are fitted together, form a continuousdeep groove, which is occupied by a pair of open spring rings 12, whichnormally exert a contracting effect upon the ring and thus cause theinner faces 5 of the sections of said ring to snugly bear against thesurface of the piston rod or shaft 1.

Formed in the side faces 7 of each ring section 4 are screw-threadedapertures 13, which are adapted to receive the threaded end of a rodused for withdrawing said ring sections from. the stuffing box when itis desircd to renew the same or to renew the flexible packing used inthe stuffing box.

The smoothing and truing rings utilized in the ends of a stuffing boxare in construction substantially like the rings just described, withthe exception that each of the sections of the end rings are formed withonly one beveled or inclined side face 7, the opposite side face 7 abeing perfectly straight and occupying a plane at right-angles to theplanes occupied by the inner and outer faces 5 and 6 of said ringsections.

`When positioned in a stufling box the straight face 7a of the innermostend ring lies directly against the inner end of the annular chamberwithin said stulling box, while the straight face 7 a of the outer oneof said rings bears against the inner end of the gland 3. ln someinstances a pair of the rings constructed as liust described with thestraight side faces 7 a may be fitted together within the stufling box,as shown in Fig. 2,

thus obtaining practically the same construction as where the rings areprovided with two inclined or beveled side faces.

When the smoothing and truing rings are properly positioned in astuffing box, the spring rings l2 hold the inner faces of the ringsections in close contact with the surface of the piston rod orreciprocating shaft, and when so held the external diameter of each ringis slightly less than the internal diameter of the annular chamber inthe stuffing box, and thus each ring has sufficient space to expandslightly and give with any unevenness on the surface of the rod orshaft, and which unevenness will, in a short time, be worn down as aresult of the smoothing action of the inner surfaces of the rings uponsaid rod or shaft. The spring rings l2 fit snugly within the grooves 11and hold the ring sections together in proper shape to form a true ringand said ring sections are thus held against any side movement, and areonly permitted to expand and contract.

The smoothing and trui-ng rings constructed as herein described areapplied to a stuffing box around the piston rod or shaft operatingtherethrough, as seen in Fig. l, and sections 14 of flexible packing arefitted in the spaces between the smoothing and truing rings, and whenthe gland 3 is forced into the stuffing box, the inclined faces 7 and 7aon the smoothing rings bear against the ends of the flexible packingrings, thus tightly compressing the same and forcing the inner surfacesor peripheries of said packing rings onto the surface of the rod orshaft l, thus effecting a perfect packing for said rod or shaft, thesurface of which is kept perfectly true and smooth as it reciprocatesthrough the metal rings, the inner surfaces of which are grooved to formsmoothlng edges.

Smoothing and truing rings of my iinproved construction are very simple,easily applied for use, can be readily combined With any ordinary formof fiexible packing, and in use maintain the surface of a piston rod orreciprocating shaft perfectly smooth and true.

l claim- 1. A smoothing and truing ring of the class described, composedof a series of segmental sections, the adjacent ends of which sectionsare beveled, the inner and outer peripheral faces of which sections areparallelV and the side faces of said sections are uniformly tapered fromthe inner to the outer faces, and the inner and outer faces of eachsection being uniformly tapered from its in-V ner to its outer face, asplit spring ring seated in the grooves formed in the outer face of thesections for holding said sections together, and flexible packing ringsarranged between the smoothing and truing rings.

In testimony whereof, I have signed my name to this specification, inpresence of two subscribing witnesses.

AUGUST H. FRANKE. Y

Witnesses: l i

M. P. SMirn, E. L. ALLACE.

